12 V lithium cobalt acid lithium battery generally refers to 11.1 V 3 series battery pack, or refers to the four series of lithium iron phosphate battery 12.8 V.

The origin of the name of the 12 v lithium-ion battery: we know lead-acid battery monomer voltage is 2 v, six series of cases is 12 v, and early use batteries for lead-acid batteries for the most part, and the 12 v lead-acid batteries are widely used in all walks of life, all kinds of portable electronic products are all adopted the use of the 12 v voltage. Later on the nickel cadmium, nickel metal hydride batteries also mentioned 12 V (12 V) * 10 = 1.2 V monomer. Because all kinds of portable electronic products update using lighter, longer service life of lithium batteries, used to call this lithium battery for 12 v li-ion battery. Cobalt acid lithium battery 3.7 V, or 3.2 V lithium iron phosphate monomer, cannot be assembled into the 12 V, only 11.1 V or 12.8 V. And our portable electronic ?